Kinetics of the molybdate catalyzed oxidation of iodide by hydrogen peroxide

1976 ◽  
Vol 8 (1) ◽  
pp. 1-10 ◽  
Author(s):  
R. H. Smith ◽  
J. Kilford
Keyword(s):  
Hydrogen Peroxide ◽  
Kinetics Of ◽  
Catalyzed Oxidation

scholarly journals KINETICS OF OXIDATION WITH HYDROGEN PEROXIDE AND IRON(II) COMPLEX WITH A MACROCYCLIC BINUCLEATING LIGAND

1995 ◽  
Vol 3 (3) ◽  
pp. 55-62
Author(s):  
Lourdes T. Kist ◽  
Bruno Szpoganicz ◽  
Manuel G. Basallote ◽  
Maria J. F. Trujillo ◽  
Maria A. Mariez
Keyword(s):  
Hydrogen Peroxide ◽  
Macrocyclic Ligand ◽  
Kinetic Studies ◽  
Organic Substrates ◽  
Kinetics Of Oxidation ◽  
Oxidation Processes ◽  
First Order ◽  
First Order Kinetics ◽  
Kinetics Of ◽  
Catalyzed Oxidation

In the present study solutions of a complex of Fe(II) with a macrocyclic ligand were prepared and their oxidation kinetics with hydrogen peroxide examined. The kinetic studies of the oxidation processes lead to values of rate constant of two-step which occur via first-order kinetics. The results are expected to result in a better knowledge of the mechanism of H202 activation in catalyzed oxidation of organic substrates.

Kinetic study of peroxidase-catalyzed oxidation of 1-hydroxypyrene. Development of a nanomolar hydrogen peroxide detection system

2008 ◽  
Vol 3 (3) ◽  
pp. 224-232 ◽  
Author(s):  
Rūta Ivanec-Goranina ◽  
Juozas Kulys
Keyword(s):  
Hydrogen Peroxide ◽  
Detection System ◽  
Amplex Red ◽  
Hydrogen Peroxide Detection ◽  
H2o2 Detection ◽  
System 1 ◽  
Kinetics Of ◽  
Catalyzed Oxidation ◽  
Oxidation System

AbstractKinetics of 1-hydroxypyrene (1-HP) oxidation catalyzed with recombinant Coprinus cinereus (rCiP) and horseradish (HRP) peroxidases was investigated with a special emphasis for developing a nanomolar hydrogen peroxide (H2O2) detection system. At pH 8.0 the bimolecular constants of 1-HP oxidation with the ferryl compounds of rCiP and HRP were equal to (1.0 ± 0.3) × 108 M−1 s−1 and (0.6 ± 0.2) × 108 M−1 s−1, respectively. High bimolecular constants and fluorescence quantum yield of 1-HP (0.66) permitted detection as low as 21 nM of H2O2. To optimize the detection system 1-HP oxidation was modeled at steady-state conditions in the range pH 5.0 to pH 8.0. The 1-HP based detection system was compared with the Amplex Red system. The peroxidase-catalyzed 1-HP oxidation system was used for determination of ozone in the air.

scholarly journals Metal-catalyzed oxidation renders silver intensification selective. Applications for the histochemistry of diaminobenzidine and neurofibrillary changes.

1986 ◽  
Vol 34 (12) ◽  
pp. 1667-1672 ◽  
Author(s):  
F Gallyas ◽  
J R Wolff
Keyword(s):  
Hydrogen Peroxide ◽  
Oxidative Polymerization ◽  
Silver Coating ◽  
Neurofibrillary Changes ◽  
Iodide Ions ◽  
Tissue Sections ◽  
Metal Catalyzed Oxidation ◽  
Pre Treatment ◽  
Metal Catalyzed ◽  
Catalyzed Oxidation

Physical developers can increase the visibility of end products of certain histochemical reactions, such as oxidative polymerization of diaminobenzidine and selective binding of complex silver iodide ions to Alzheimer's neurofibrillary changes. Unfortunately, this intensification by silver coating is generally superimposed on a nonspecific staining originating from the argyrophil III reaction, which also takes place when tissue sections are treated with physical developers. The present study reveals that the argyrophil III reaction can be suppressed when tissue sections are treated with certain metal ions and hydrogen peroxide before they are transferred to the physical developer. The selective intensification of Alzheimer's neurofibrillary changes requires a pre-treatment with lanthanum nitrate (10 mM/liter) and 3% hydrogen peroxide for 1 hr. The diaminobenzidine reaction can be selectively intensified when physical development is preceded by consecutive treatments with copper sulfate (10 mM/liter, pH 5, 10 min) and hydrogen peroxide (3%, pH 7, 10 min). In peroxidase histochemistry, this high-grade intensification may help to increase specificity and reduce the threshold of detectability in tracing neurons with horseradish peroxidase or in immunohistochemistry when the peroxidase-antiperoxidase method is used.

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